Install setuptools for Python 3.12 (only)

This (or "pip install build" with "python -m build") is needed
for Python 3.12 with "python setup.py sdist"

.github/workflows/eb_command.yml

@@ -32,6 +32,10 @@ jobs:
         # update to latest pip, check version
         pip install --upgrade pip
         pip --version
+        if [[ "${{matrix.python}}" == 3.12 ]]; then
+            # needed for python setup.py sdist
+            pip install --upgrade setuptools
+        fi
 
         # for modules tool
         APT_PKGS="lua5.2 liblua5.2-dev lua-filesystem lua-posix tcl tcl-dev"

.github/workflows/unit_tests.yml

@@ -85,6 +85,10 @@ jobs:
         pip install --upgrade pip
         pip --version
         pip install -r requirements.txt
+        if [[ "${{matrix.python}}" == 3.12 ]]; then
+            # needed for python setup.py sdist
+            pip install --upgrade setuptools
+        fi
         # git config is required to make actual git commits (cfr. tests for GitRepository)
         git config --global user.name "Travis CI"
         git config --global user.email "[email protected]"